package zhujie;



public class Demo01 {
    @Check
    public void add(){
        System.out.println("1+1=2");
    }

    @Check
     public void sub(){
        System.out.println("2-1=1");
    }

    @Check
   public void mul(){
        System.out.println("1*1=1");
    }


    @Check
    public void div(){
        System.out.println(1/0);
    }

}
